IKO Glass Fibre Underlay is a waterproofing membrane consisting of a strong glass-fibre base coated with APP. It is sand finished on both surfaces.
Used as an economical underlay (or intermediate layer) in a built-up felt roofing system, it is usually fully bonded in hot bitumen. It is also used as an underlay to bitumen shingles in a pitched roof application.
This range of IKO glass-fibre roofing membranes consists of underlays and capsheets, complying with former BS 747: 2000 Type 3 where applicable.
The products usually have an oxidised bitumen coating and are either sand or mineral surfaced. These products are usually applied with hot bonding bitumen or cold bitumen adhesive.
Used beneath shingles in boarded pitched roofs mechanically fixed with large headed galvanised clout nails.
